ALEXANDRIA, Va., Oct. 28 -- United States Patent no. 12,456,447, issued on Oct. 28, was assigned to Renesas Design Netherlands B.V. ('s-Hertogenbosch, Netherlands).

"Tools and methods for designing filters for use in active noise cancelling systems" was invented by Paul Shields (Dunblane, Great Britain), Wessel Harm Lubberhuizen (Hengelo, Netherlands) and Fotios Kontomichos (Patras, Greece).

According to the abstract* released by the U.S. Patent & Trademark Office: "A computer-implemented method of automated filter design comprising designing a feedback filter for an active noise cancelling system."

The patent was filed on Dec. 15, 2022, under Application No. 18/066,332.

*For further information, including images, charts and tables, ple...